Submission #900140

#	Time	Username	Problem	Language	Result	Execution time	Memory
900140		Omar_Elgedawy	Combo (IOI18_combo)	C++14	100 / 100	11 ms	2044 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;
mt19937 mt(time(nullptr));

string guess_sequence(int n) {
    vector<char> chr(3);
    string cur;
    if(press("AB")){
        if(press("A")){
            cur="A";
            chr={'B','X','Y'};
        }
        else{
            cur="B";
            chr={'A','X','Y'};
        }
    }
    else{
        if(press("X")){
            cur="X";
            chr={'B','A','Y'};
        }
        else{
            cur="Y";
            chr={'A','X','B'};
        }
    }
    for (int i = 1; i < n-1; i++) {
//        cout<<cur+chr[0]+chr[0]+cur+chr[0]+chr[1]+cur+chr[0]+chr[2]+cur+chr[1]<<endl;
        int len=press(cur+chr[0]+chr[0]+cur+chr[0]+chr[1]+cur+chr[0]+chr[2]+cur+chr[1]);
        if(len==cur.size())cur+=chr[2];
        else if(len==cur.size()+2)cur+=chr[0];
        else cur+=chr[1];
    }
    if(n>1){
        if(press(cur+chr[0])==cur.size()+1)cur+=chr[0];
        else if(press(cur+chr[1])==cur.size()+1)cur+=chr[1];
        else cur+=chr[2];
    }
//    cout<<cur<<endl;
    return cur;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:33:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         if(len==cur.size())cur+=chr[2];
      |            ~~~^~~~~~~~~~~~
combo.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         else if(len==cur.size()+2)cur+=chr[0];
      |                 ~~~^~~~~~~~~~~~~~
combo.cpp:38:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         if(press(cur+chr[0])==cur.size()+1)cur+=chr[0];
      |            ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:39:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         else if(press(cur+chr[1])==cur.size()+1)cur+=chr[1];
      |                 ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95